Data Link Diagnostic Test

WARNING: This page is about a different car, the 2002 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

Connect New Generation Star (NGS) tester to Data Link Connector (DLC), if not already connected. Select vehicle to be tested from NGS tester menu.
Turn ignition switch to RUN position. Rotate dial on NGS tester to menu item DIAGNOSTIC DATA LINK and press trigger. A test will be performed on the bus (circuits No. 914 and 915) for the module communications network and the ISO 9141 communication link (circuit No. 70).
If NGS tester displays CKT 914 (+) = SYSTEM PASSED and CKT 915 (-) = SYSTEM PASSED, or if NGS tester displays CKT 70 = SYSTEM PASSED, ISO 9141, module communications network is okay. Return to article that directed you here and continue diagnosis.
If no response from NGS tester, go to TEST J: NO MODULE/NETWORK COMMUNICATION under SYSTEM TESTS. Perform the following as applicable. If NGS tester displays:
- CKT70, CKT914 and/or CKT915 = SOME ECUS NO RESP/NOT EQUIP, go to SYMPTOM INDEX table under SYSTEM TESTS to continue diagnosis for module in question.
- CKT70 = ALL ECUS NO RESP/NOT EQUIP, go to TEST H: NO MODULE/NETWORK COMMUNICATIONS - ISO 9141 LINK under SYSTEM TESTS.
- CKT914 = ALL ECUS NO RESP/NOT EQUIP, go to TEST I: NO MODULE/NETWORK COMMUNICATION - BUS LINK under SYSTEM TESTS.
- CKT915 = ALL ECUS NO RESP/NOT EQUIP, go to TEST I: NO MODULE/NETWORK COMMUNICATION - BUS LINK under SYSTEM TESTS.
- NO RESPONSE/NOT EQUIPPED, go to SYMPTOM INDEX table under SYSTEM TEST to continue diagnosis for module in question.
- NO RESPONSE ON CKT914 (BUS +), go to SYMPTOM INDEX table under SYSTEM TESTS to continue diagnosis for module in question.
- NO RESPONSE ON CKT 915 (BUS -), go to SYMPTOM INDEX table under SYSTEM TESTS to continue diagnosis for module in question.